Japanese Zelkova
Zelkova serrata · Keyaki (欅)
The definitive subject for the pure Broom style (Hokidachi). In winter, a well-refined Keyaki displays hundreds of fine, fan-shaped twigs radiating symmetrically from a single straight trunk flare.
Substrate & Soil Mix
70% Akadama, 20% Pumice, 10% Lava.
Watering Discipline
Moderate; keep evenly moist without waterlogging.
Sunlight & Placement
Full sun to partial afternoon shade.
Pruning & Pinching Window
Spring shoot pinching; winter twig refinement.
Wiring Season
Spring when shoots are soft; avoid wiring thin mature twigs.
Repotting Cadence
Every 2–3 years in early spring.
Curatorial Cultivation Manual
Irrigation Technique
Regular watering as the surface dries. Thirsty in summer; maintain steady moisture.
Seasonal Fertilizing Program
Light, balanced organic feeding in spring to prevent coarse, thick internodes.
Pruning & Pad Refinement
Pinch new spring growth to a single leaf to multiply twig density and create the characteristic broom silhouette.
Root Reduction & Repotting
Repot in early spring before bud break. Radial root spreading (nebari development) is critical for broom styling.
Winter Cold Protection
Hardy to -10°C (14°F). Shield the delicate fine twigs from drying winter gales.
Common Pests & Pathogens
- Aphids
- Spider mites
- Gall mites
Traditional Classical Styles
- Classical Broom (Hokidachi)
- Informal Upright (Moyogi)
Document Your Japanese Zelkova in Kenara
Log repotting histories, track seasonal wiring timelines, and run optical foliage health diagnostics on your trees.